Electrical switch



May 3, 1927. 1,627,158

J. DoMxNlczAK v ELECTRICAL SWITCH Filed April 29, 1926 Patented May 3, 1927.

JOHN DOMINICZAK, OF BRADDOCK, PENNSYLVANIA.

ELECTRICAL SW'ITCH.

Application filed April 29, 15226.

T his invention relates to electricl switches and has special reference to switches ot the type called pole changers beingr in the term ot a double pole double throw switch.

One object ot the invention is to provide au improved general construction. et' switches ot this character wherein by the provision ot a continuous contact with the source ot current supply, one .lead and terminal can be eliminated.

A second object ot the invention is to pro-r vide an improved switch ol this type wherein the switch is adapted to be sunk in a wall or tloor and operated by a pair ot push buttons.

A third important object oit the invention is to provide a novel and improved switch especially adapted to control a light or system ot lights troni a number ot' diti'erent points lVith the above and other objects in view as will be hereinafter apparent, the invention consists in general ot' certain novel details,

ot construction. and con'ibinations ol parts l hereinattci.' t'ully described, illustrated in the accompanying drawings and speeiteally claimed.

lu the accompanying drawings like characters o'l reference indicate like parts in the several views, and.

Figure l is a top plan view ot the switch with the cover plate in position.

Figure Q a similar view with the top removed.

ltigure 3 is a vertical longitudinal section through the switch and its casing.

Figure l a vertical transverse section looking' toward the pole changing end oit the switch.

Figzjure is a bottom plan view ot the switch. f

lu the present embodiment there :is shown a switch having a casing;v provided with a bottom l0, side walls ll and end walls l2. This casing also has a top 13 reniovably se* cured by suitable means to the body ot the casing.

Within the casing centrally thereot is a supporting` block lll of insulating' material and this block pivoted centrally ot its sides on the pivot screws l5 which extend throiiin'h the side walls ll. On each side edge ol the tilting` block l/lis lixed a con tact. blade 1G which projects at both ends beyond the block lll. (lne end ot each ol' these blades slidingly engages a respective Serial No. 1055463.

Contact rod 1"( eXtending vertically of the casi ng adjacent one end wall., each rod beinn' secured at both ends to the casing and ha vino' its lower end connected to a binding post i8 mounted on the under side ot the bottom l0. e

lVithin the opposite end ofthe casing is a pair ot upper lined contacts 19 and a pair ot lower iixed contacts 20, the pairs of contacts beingY positioned tor selective engagement by the blades as the latter are tilted up or down atthis end ot the switch. over, when the blades are disposed centrally ot' their tiltingmovement they will be out ot contact with both pairs oit fixed contacts. These two pairs ot fixed contacts are cross connected by wires 2l running down through one end. wall and crossing each other on the bottom l07 and these wires terminate in bind.- ing posts 22 by which the switch may be connected to wires leading to one or more lamps or other translating device such as reversing motor. Thus, when this end ot the block is pushed down the connections are made so that one post 22 terms the positive connection and the other the negative while, when the block is tilted in the opposite direction the polarity of these terminals is reversed. An important feature ot the in vention resides in the provision ot the single Contact rod 't7 with which the contact blade 16 constantly engaged, the other end ot the Contact i6 selectively engaging the fixed contacts 20. It is now possible to eliminate one ol the lead wires and binding post that would ordinarily be connected to double spaced contacts, and with the single con'- tinuous contact rod, the same objects are accomplished with a less number ot elements.

Carried by the blocl-r 11i; is a pair oit spaced push buttons 2?, there being one on each side ot the pivotal axis7 and these push buttons protrude tl'irough suitable openings in the top 13.

It will lbe plain that by pushing either button down to the extent ot its tull movement the switch will be closed but that with both buttons on a level the switch will be openn Moreover it the switch is connected to a reversing motor pushing one button will cause the motor to run in one direction and pushing' the other button will cause the motor to run in the reverse direction.

It is to be noted that the switch thus constructed is entirely7 tree trom springs or other parts liable to get out ot order.

lVlorcles lil

claimed as neiv, is:

l. In a stvit'eh of the kind described a easing, an insulating block pivoted centralliY oit its length within said casing tor tilting, movement, a pair ot knife switch blades each mounted on a respective side of' the tilting block and projecting' at both ends beyond the block, a pair ot fixed contact rods at one end ot the easing' and positioned to be slig'litllv7 engaged bv the portions ot the blades projectingr from one end of the block throne-'hout their full range of movement, a. pair of upper fixed contacts and a second pair ot lower fixed contacts in the paths of the remaining ends ot said blades.` ter-` minal connecting' posts Vtor said fined contacts, a single connecting post for each eontact rod leading to a. source of energy` and means to actuate the switch.

2. n a switch of the kind described.y a casing, an insulating` block pivoted eentrallv ot its length ivithin said easinpT for tilting movement, a pair ot knife sivitch blades each mounted on a respective side ot the tilting block and projecting` at both ends beyond the block` a pair ot fixed contact rods at one end ot the casing' and positioned to be slidably engaged by the portions of' the blades projecting' from one end of the block throughout their vfull range ot movement, a pair ot upper fixed contacts and a second pair of lower fixed contacts in the paths Ot the remaining' ends ot said blades, terminal connecting` posts for said fixed contacts, a Single connecting post Vtor each contact rod leading' to a sonree of energy, and ay pair of push buttons fixed to the tilting mames block on opposite sides of its pivotal center and projecting;Y through the top ot said casing'.

3. In a switch ot' the kind deserilied. a easing', an ,insulating block pivoted centrally of its length ivithiin said easing for tilting movement.` a pair ot knife switch blades each mounted on a respective side ot the tilting block and prolieetinre at both ends be youd the block. a pair ot fixed contact rods at one end of the casing' and positioned to ie slida-blv ei'igiaggcd b v the portions ot' the blades projecting 'from one end of the block throughout their 'tull range of movement, a pair ot' upper fixed contacts and a second pair of' loiver fixed contacts in the paths ot' the remaining' ends of' said blades, terminal connecting; posts for said fixed oontaets, a single connecting' post tor each c ntact rod leading; to a source of energy, means to actuate the switch, and wires connecting; the contacts ot' one ot" said pairs with the contacts oli-the other pair in crossed relaa tion.

ft. In a sivitch of the kind described, casing, an insulating' block pivoted eentinlli7 ot its length vi'ithin said casini;v 'tor tiltingT inoienient, a pair o't kni'te sivitch blades each mounted on a respective side ot the tiltingT block and projecting` at both ends beyond the block, a pair ot fixed contact rods at one end of the casing;` and positioned to he slidably engaged hv the portiiins ot the blades jnojeeting' from one, end o't the block throughout their `full range of movennnlt. a pair ot upper fixed contacts and a second pair ot loiver fixed contacts in the paths oit the remaining' ends ot' said blades,V ter minal connectingr posts itor said fixed contacts, a sinp'te connecting' post 'for each contact .rod leading` to a source ot' energy, a pair ot push buttons fixedto the tilting block on opposite sides ot its pivotal center and proie tiine' thronp'n theI top of said casing, and wires connecting the contacts ot one oit said pairs with the contacts oli the other pair in crossed relation.

ln testimony vvhereoif l aiiix my signature.

JOHN DUHNLCZAK,

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